321 steel belongs to stainless steel. 321 stainless steel is particularly suitable for use in sulfuric acid environments and coastal areas.
There are five main elements in the steel, carbon(C), manganese(Mn), phosphorus(P), sulfur(S), silicon(Si), other alloy elements, molybdenum(Mo), chromium(Cr), cobalt(CO), silicon(Si), titanium(Ti), nickel(Ni), niobium(Nb), lead(Pb), Boron(B), tungsten(W), vanadium(V).
321 chemical composition detailed explanation table:
Grade |
321 |
|
|
C |
0.06-0.08 |
If the carbon content in steel increases, the yield point and tensile strength will increase, however, the plasticity and impact resistance will decrease. |
|
Si |
0.5-1 |
Silicon can significantly increase the steel elastic limit, yield point and tensile strength. Silicon content increasing, will reduce the welding properties of steel. |
|
Mn |
1.2-2 |
Manganese content increasing weakens steel corrosion resistance, reduces the welding performance. |
|
P |
0.02-0.045 |
In general, phosphorus is harmful element in steel, increases steel cold brittleness, leads welding performance deterioration and cold bending property deterioration, reducing plastic. |
|
S |
0.02-0.03 |
Sulfur in general is also harmful element. Sulfur makes steel produce heat, reduces the ductility and toughness, cause cracks in forging and rolling. Sulfur on welding performance is also negative, reduces corrosion resistance. |
|
Cr |
17-19 |
Chromium can significantly increase the strength, hardness and wear resistance, but otherwise reduce the plasticity and toughness. |
|
Ni |
9-12 |
Nickel can improve the strength and maintain good plasticity and toughness. |
|
Ti |
0.48-0.5 |
Titanium can make the steel compact microstructure and grain refinement; reduce the aging and cold brittleness; improving welding property. |
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